<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0120-419X</journal-id>
<journal-title><![CDATA[Revista Integración]]></journal-title>
<abbrev-journal-title><![CDATA[Integración - UIS]]></abbrev-journal-title>
<issn>0120-419X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Industrial de Santander]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-419X2016000200006</article-id>
<article-id pub-id-type="doi">10.18273/revint.v34n2-2016006</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Un algoritmo cuasi-Newton para resolver la ecuación cuadrática matricial]]></article-title>
<article-title xml:lang="en"><![CDATA[A quasi-Newton algorithm to solve the matrix quadratic equation]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[MACÍAS]]></surname>
<given-names><![CDATA[MAURICIO]]></given-names>
</name>
<xref ref-type="aff" rid="AFF"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[MARTÍNEZ]]></surname>
<given-names><![CDATA[HÉCTOR J.]]></given-names>
</name>
<xref ref-type="aff" rid="AFF"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[PÉREZ]]></surname>
<given-names><![CDATA[ROSANA]]></given-names>
</name>
<xref ref-type="aff" rid="AFF"/>
</contrib>
</contrib-group>
<aff id="AF1">
<institution><![CDATA[,Universidad del Cauca Departamento de Matemáticas ]]></institution>
<addr-line><![CDATA[Popayán ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="AF2">
<institution><![CDATA[,Universidad del Valle Departamento de Matemáticas ]]></institution>
<addr-line><![CDATA[Cali ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<volume>34</volume>
<numero>2</numero>
<fpage>187</fpage>
<lpage>206</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-419X2016000200006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-419X2016000200006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-419X2016000200006&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen. En este artículo proponemos un algoritmo cuasi-Newton para resolver una ecuación cuadrática matricial, el cual reduce el costo computacional del método Newton-Schur, tradicionalmente usado para resolver dicha ecuación. Demostramos que el algoritmo propuesto es local y hasta cuadráticamente convergente. Presentamos pruebas numéricas que ratifican los resultados teóricos desarrollados.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract. In this paper we propose a quasi-Newton algorithm to solve a matrix quadratic equation, which reduces the computational cost of Newton-Schur method, traditionally used to solve this equation. We show that the proposed algorithm is local and up to quadratically convergent. We present some numerical tests which confirm the theoretical results developed.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Función cuadrática matricial]]></kwd>
<kwd lng="es"><![CDATA[operador de Fréchet diferenciable]]></kwd>
<kwd lng="es"><![CDATA[método de Newton-Schur]]></kwd>
<kwd lng="es"><![CDATA[convergencia cuadrática]]></kwd>
<kwd lng="en"><![CDATA[matrix cuadratic equation]]></kwd>
<kwd lng="en"><![CDATA[Fréchet derivative operator]]></kwd>
<kwd lng="en"><![CDATA[Newton-Schur method]]></kwd>
<kwd lng="en"><![CDATA[quasi-Newton method]]></kwd>
<kwd lng="en"><![CDATA[cuadratic convergence]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[   <font size="2" face="Verdana">     <p align="left"><b>DOI:</b> <a href="http://dx.doi.org/10.18273/revint.v34n2-2016006" target="_blank">http://dx.doi.org/10.18273/revint.v34n2-2016006</a></p>      <p align="center"><font size="4"><b><i>Un algoritmo cuasi-Newton para resolver    <br> la ecuaci&oacute;n cuadr&aacute;tica matricial</i></b></font></p>      <p align="center">MAURICIO MAC&Iacute;AS<sup>a*</sup>, H&Eacute;CTOR J. MART&Iacute;NEZ<sup>b</sup>,    <br> ROSANA P&Eacute;REZ<sup>a</sup></p>       <p align="center"><sup>a</sup> Universidad del Cauca, Departamento de Matem&aacute;ticas, Popay&aacute;n, Colombia.    <br> <sub>b</sub> Universidad del Valle, Departamento de Matem&aacute;ticas, Cali, Colombia.</p>  <hr>      <p align="justify"><b><i>Resumen.</i></b> En este art&iacute;culo proponemos un algoritmo cuasi-Newton para resolver una ecuaci&oacute;n cuadr&aacute;tica matricial, el cual reduce el costo computacional del m&eacute;todo Newton-Schur, tradicionalmente usado para resolver dicha ecuaci&oacute;n. Demostramos que el algoritmo propuesto es local y hasta cuadr&aacute;ticamente convergente. Presentamos pruebas num&eacute;ricas que ratifican los resultados te&oacute;ricos desarrollados.</p>      <p align="justify"><b><i>Palabras clave:</i></b> Funci&oacute;n cuadr&aacute;tica matricial, operador de Fr&eacute;chet diferenciable, m&eacute;todo de Newton-Schur, convergencia cuadr&aacute;tica.    ]]></body>
<body><![CDATA[<br> <b><i>MSC2010:</i></b> 65H10, 49M15, 90C53, 15A24, 39B42.</p>  <hr>      <p align="center"><font size="3"><b><i>A quasi-Newton algorithm to solve the matrix    <br> quadratic equation</i></b></font></p>      <p align="justify"><b><i>Abstract.</i></b> In this paper we propose a quasi-Newton algorithm to solve a matrix quadratic equation, which reduces the computational cost of Newton-Schur method, traditionally used to solve this equation. We show that the proposed algorithm is local and up to quadratically convergent. We present some numerical tests which confirm the theoretical results developed.</p>      <p align="justify"><b><i>Keywords:</i></b> matrix cuadratic equation, Fr&eacute;chet derivative operator, Newton-Schur method, quasi-Newton method, cuadratic convergence.</p>  <hr>      <p align="justify">Texto Completo disponible en <a href = "pdf\rein\v34n2\v34n2a06.pdf" target="_blank">PDF</a></p>  <hr>      <p align="left"><font size="3"><b><i>Referencias</i></b></font></p>      <!-- ref --><p align="justify">&#91;1&#93; Bai Z-Z., Guo X-X and Yin J-F., &quot;On two iteration methods for the quadratic matrix equations&quot;, <i>Inter. J. Numer. Anal. 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<body><![CDATA[<br> Recibido: 01 de julio de 2016, Aceptado: 17 de noviembre 2016.    <br> Para citar este art&iacute;culo: M. Mac&iacute;as, H.J. Mart&iacute;nez, R. P&eacute;rez, Un algoritmo cuasi-Newton para resolver la    <br> ecuaci&oacute;n cuadr&aacute;tica matricial, <i>Rev. Integr. Temas Mat.</i> 34 (2016), No. 2, 187-206.</p>  </font>      ]]></body><back>
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